MediaWiki/languages/messages/MessagesFrr.php

<?php
/** Northern Frisian (Nordfriisk)
 *
 * To improve a translation please visit https://translatewiki.net
 *
 * @ingroup Language
 * @file
 *
 */

$fallback = 'de';

$linkTrail = '/^([a-zäöüßåāđē]+)(.*)$/sDu';